Difference between revisions of "Ormsby filter"

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(corrected and simplified expression (had incorrect extra pi in sinc function))
(ref link)
 
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==External links==
 
==External links==
* [http://www.cseg.ca/publications/recorder/1994/09sep/sep94-choice-of-wavelets.pdf Ryan, 1994.] A choice of wavelets. CSEG Recorder September 1994.
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* Ryan, H (1994). Ricker, Ormsby, Klauder, Butterworth — A choice of wavelets. CSEG Recorder 19 (7). [https://csegrecorder.com/articles/view/ricker-ormsby-klander-butterworth-a-choice-of-wavelets Available online.]
 
* [http://wiki.seg.org/index.php/Dictionary:Ormsby_filter Ormsby filter] — Sheriff's Encyclopedic Dictionary
 
* [http://wiki.seg.org/index.php/Dictionary:Ormsby_filter Ormsby filter] — Sheriff's Encyclopedic Dictionary
  

Latest revision as of 17:33, 8 February 2021

A common type of synthetic wavelet in reflection seismology.

where

  • f1 = low-cut frequency
  • f2 = low-pass frequency
  • f3 = high-pass frequency
  • f4 = high-cut frequency

An example might have frequencies of 5–10–40–45 Hz. This defines a trapezoidal shape in the frequency spectrum.

Ormsby-filtered wavelets have several sidelobes, unlike Ricker wavelets which only have two, one either side.

See also

External links

  • Ryan, H (1994). Ricker, Ormsby, Klauder, Butterworth — A choice of wavelets. CSEG Recorder 19 (7). Available online.
  • Ormsby filter — Sheriff's Encyclopedic Dictionary

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